Rotary calking tool



Feb. 13, 1923. 1,445,415

I L. G. SCHWEINEBRATEN ROTARY CALKING TOOL Filed Apr. 18, 1921 INVENTOR Louis G. Schweinebr'ufen.

ATTORN EY Patented Feb. l3, 192? LOUIS G. SCHVJEIIUEBRATEEK,

BQTABY Glf-LLKING TOOL.

Application filed April 155, 1821.

To all whom it may concern:

Be it known that I. Louis SGHWElNiI- nRA'rnN, citizen of the United States ol' America, residing at Birmingham, in the county of Jefferson and State of Alabama. have invented certain new and useful linprovements in Rotary Calking Tools, of which the following is a specification.

My invention relates to a rotary calking tool which is especially designed for se in calking crown sheet bolts of boilei and the like where it is impractical to use the call;- ing hammers by reason of the fact that the calking of one bolt head tends to loosen and cause adjacent calked bolt heads to leak.

My invention especially adapted to be used with the generally available con'ipressed air motors so that it can be conveniently handled and applied to its work.

My invention consists especially in the provision of a tool head having an annular series of sockets opening through its and adapted to receive loosely rotatable calking pinswhich have a rounded worl p; end. As the tool head is rotated these pins travel around the bolt head and expand its rini until it is spread substantially and pressed tightly against the crown so to-eti'ect a reliable and permanent steam tight joint and this is accomplished quickly and reliably without disturbing the rallied joints previously formed on adjacent bolts.

It a further feature of my invention that the pins are reversible and that they tr nit their end thrust to taper tool al bearln'g' blocks d tachably seated in the bottom oi their sockets.

A further feature oi my invention is the providing ot' the tool with a deeply countersunk recess surrounded by the pins and adapted to receive the bolt head and its tool shank.

The advantages of my invention and the manner of its construction and operation will be better understood by reference to the detailed description and to the appended claims which follow, reference being had to the accompanying drawings which illustra e only what I consider the preferred embodiment of my invention, in which z- Fig. 1 shows the tool in vertical cross t-ion at work.

Fig. 2 is an end elevation 01' l; and

Fig. 8 is a partial View through a lire box showing the tool at work with its air motor drive and stand assembled.

Serial No. 162, 258.

l jiniilarre enconinnerals refer to similar parts tln'o'zj-Lghout the drawings.

in llig. 3 1 illustrate my appliance in use ca ing the bolts in the crown sheet 52 ot' the tire box 3 which has a grate which the stand or bar 5 rests. l i l ar is HlOiZllitLl an air motor (5 oi any suitable type having an air teed pipe '7 handle 8 and a tool chuck 9. I show mounted in this tool chuck the shank 10 of the lking; tool head Ill. This tool head has in base a threaded socket 12 which receives. a re duced screw shank 13 on the upper end of the shank is). The tool head is substantially cylindrical in shape and is provided with a longitudinal central bore which is enlarged at the upper end of the tool head to form the circular bolt head seat 153. Surrounding this 15 ll drill or otherwise form a series ot pin seats 16 which are inclined at a "rht outwardly diverging angle as they approach the working endoi the tool head. These seats intersected by the seat l it nerei-r-iary and each is provided end with a tool steel tapered l7 upon which is adapted to bearing h bear the inner end ol its respective calking: pin 18. hose pins lit snug but are free to turn in their respective and their ends are rounded and project appreciably beyond the working end oi the tool head. The pins are preterahly roi'lnded Slll'lil:ill\' at both ends so tl'iat they can be taken out of the r seats and reversed. thus enab. both to be used in the (talking); work. 1 pro itures drilled through the lower end o the tool head l throi i which. alter in" owing the shank it), a tool can be insertedto dislodge and drive out the bearing blocks 17.

The tool having been assembled and constructed in the manner described. is applied to the work as shown in Figs. l and 3%, and as the air motor rotates the shank 10 the feed screw 20 is turned to feed the tool to the work. The result is that the pins, as they ride about the rounded bolt head l gencnlly deform it troni its hemispherical design as shown at l to the calked shape shown {it 2i, in Fig. l. and in "thus determing the bolt head it is spread and forced against the crown sheet 2 in such manner that a most eilective and steam tight celked joint is obtained. square head or tool grip on the bolt heads dapted to be received freely in the bore ot the tool operation is completed.

head as the latter rotates, while the depth and Width of the bolt head seat is ample shown merely to illustrate that the rivet head can be ca l ZGCl with my improved tool Whether or not the grip has been burned oil. The tool operates very rapidly and effectively to callr the bolt heads and does not disturb the crown sheet or aii'ect previously calked joints. The number of calking pins employed may be varied but to better balance the tool at its Worknot less than three equally spaced pins should be used and, of course, all disposed equidistant from the axis of the tool head. It is only es. entia-l that the pins project su'liiciently beyond the tool head opposite the bolt or rivet head,'to enable the pins to follow theirflworl: down until the joint is calked. I obtain a stronger tool by countersinking the head ll to re ceive the bottom rivet head as by this means the calking pin can WOIk with a minimum projection from its seat bearing.

Having thus described my invention, but

i Without intending to limit myself to the specific details of construction shown, What I claim, is a I 1. A calking tool, comprising a tOOlliCtl-tl adapted to be rotated and provided with a series of spaced calking pins rotatably mounted in an end of the tool head and d isposed each to engage with its outer end the margin of a bolt or rivet head to be callred.

2. A rotary tool for callring bolt and rivet heads, comprising a tool head provided with a seat to receive the head of the bolt or rivet to be call-zed, and rotatable pins ar ranged marginally about said seat and adapted to engage with their ends the margin of a bolt or rivet head in said seat.

3. A rotary tool for calhing bolt and rivet heads, comprising a tool head having a countersunk central axially disposed recess and a se'ies of spaced seats disposed lengthwise of the head and surrounding said recess, and round calkingpins loosely and rotatably mounted in andprojecting en'dwi's'e' of the tool head from said seats and adaptedto engage the margin only of the rivet head to be calked.

4. A rotary calking tool comprising a tool head having therein a seriesof pin seats inclined slightly outwardly from the axis of the tool head, and a series of spaced pins rotatably and looselymounted in and hav ing rounded calking'heads projecting from said seats and spaced from the axis of the head to engage the marginal edge of the bolt or rivet head to be swaged.

5. Arotary calking "tool as described in claim l, in which the pins are straight cylindrical steel pins rounded at both ends and reversible in the tool head.

6. A rotary ca-llring toolas described in claim 3, in which the pin seats diverge towards their open ends. j

7. A'rotary calking toolas described in claim 3, in Which the tool head has a central countersunk recess which intersects the inner edges of the outer ends ofsaid pin seats. a a

8. A rotary calking. tool comprising a shank, a tool head having aseries o l spaced tool seats bored endwise into the head and disposed tointersect a circle concentric with axis of the toolhead, and seriesof loose cylindrical pins rotatably seatedin and having a rounded end projecting from said seats, said pin ends being inclined ontwardly slightly relatively to the tool axis and spaced therefrom to engage the belt or rivet head to be calked near its marginal edge. v

9. rotary calking tool as describedin claim 8, in which at least three pin Seats and pins are provided equiv-distantly spaced. from each other and the axis of the tool.

ture.

LOUIS G. SCHWEHIEBRATEN. lVitness:

NOMIE VELSHJ In testimony whereof l ailix my signa- 

